ET MALWARE Observed Cobalt Strike CnC Domain (securityupdateav .com in TLS SNI)

7.0.35.0SID: 2033798Rev: 2Enabled3 views
Sourceet/open
Fileemerging-malware.rules
CreatedAugust 25, 2021
UpdatedMarch 25, 2024
Classificationdomain-c2
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Cobalt Strike CnC Domain (securityupdateav .com in TLS SNI)"; flow:established,to_server; tls.sni; bsize:20; content:"securityupdateav.com"; fast_pattern; reference:url,thedfirreport.com/2021/08/16/trickbot-leads-up-to-fake-1password-installation/; classtype:domain-c2; sid:2033798; rev:2; metadata:attack_target Client_Endpoint, created_at 2021_08_25, deployment Perimeter, malware_family Cobalt_Strike, confidence High, signature_severity Major, updated_at 2024_03_25, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;)

References

urlthedfirreport.com/2021/08/16/trickbot-leads-up-to-fake-1password-installation/

Metadata

attack targetClient_Endpoint
created at2021_08_25
deploymentPerimeter
malware familyCobalt_Strike
confidenceHigh
signature severityMajor
updated at2024_03_25
mitre tactic idTA0011
mitre tactic nameCommand_And_Control
mitre technique idT1001
mitre technique nameData_Obfuscation

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